Ferromagnetic skirt for a medical device

Abstract

An implantable medical device includes a wire frame, a cover, and a sensor. The wire frame is formed of struts and openings. The cover connects to the struts of the wire frame. The cover is fashioned from a fabric including a PET fabric made of PET yarn and a ferromagnetic material combined with the PET fabric. The PET yarn is made from a plurality of PET fibers. The sensor is positioned on the cover and connected to the wire frame. The cover shields the sensor from detuning effects of the wire frame.

1 . An implantable medical device comprising:
 a wire frame formed of struts and openings;   a cover connected to the struts of the wire frame, wherein the cover is fashioned from a fabric, the fabric comprising:
 a PET fabric made of PET yarn, wherein the PET yarn is made from a plurality of PET fibers; and 
 a ferromagnetic material combined with the PET fabric; and 
   a sensor positioned on the cover and connected to the wire frame.   
     
     
         2 . The implantable medical device of  claim 1 , wherein the cover is configured to shield the sensor from detuning effects of the wire frame. 
     
     
         3 . The implantable medical device of  claim 1 , wherein the PET fabric and the ferromagnetic material are both biocompatible materials, and/or wherein the ferromagnetic material has a high radiopacity. 
     
     
         4 . The implantable medical device of  claim 1 , wherein the ferromagnetic material is chosen from the group consisting of iron, manganese, zinc, and combinations thereof. 
     
     
         5 . The implantable medical device of  claim 1 , wherein the cover is flexible and configured to crimp with the wire frame when the wire frame is in a crimped state and expand with the wire frame as the wire frame moves from the crimped state to an expanded state. 
     
     
         6 . The implantable medical device of  claim 1 , wherein the ferromagnetic material is a coating of ferromagnetic material on the PET fabric. 
     
     
         7 . The implantable medical device of  claim 6 , wherein the coating of ferromagnetic material is on both sides of the PET fabric. 
     
     
         8 . The implantable medical device of  claim 6 , wherein the coating of ferromagnetic material is adjacent to the sensor. 
     
     
         9 . The implantable medical device of  claim 1 , wherein the ferromagnetic material is a ferromagnetic fabric formed of a ferromagnetic yarn, and wherein the ferromagnetic yarn is formed of a plurality of ferromagnetic fibers. 
     
     
         10 . The implantable medical device of  claim 9 , wherein the ferromagnetic fibers are formed by electrospinning ferromagnetic nanoparticles into the ferromagnetic fibers. 
     
     
         11 . The implantable medical device of  claim 9 , wherein:
 the cover includes the PET fabric stitched to the ferromagnetic fabric, and wherein a set of stitching holds the PET fabric, the ferromagnetic fabric, and the wire frame together; or   the PET fabric is adhered to the ferromagnetic fabric.   
     
     
         12 . The implantable medical device of  claim 9 , wherein the ferromagnetic fabric is adjacent to the sensor. 
     
     
         13 . The implantable medical device of  claim 9 , wherein:
 the ferromagnetic fabric is a woven ferromagnetic fabric formed of interlacing the ferromagnetic yarn;   the ferromagnetic fabric is a knit ferromagnetic fabric formed of interlooping the ferromagnetic yarn;   the ferromagnetic fabric is a braided fabric formed of intertwining the ferromagnetic yarn; or   the ferromagnetic fabric is a non-woven fabric formed by electrospinning the ferromagnetic yarn.   
     
     
         14 . The implantable medical device of  claim 1 , wherein the ferromagnetic material is a plurality of ferromagnetic fibers, and wherein the plurality of ferromagnetic fibers are woven with the plurality of PET fibers to create the fabric of the cover. 
     
     
         15 . The implantable medical device of  claim 1 , wherein the ferromagnetic material is a plurality of ferromagnetic fibers, and wherein the plurality of ferromagnetic fibers and the plurality of PET fibers are knit together to create the fabric of the cover. 
     
     
         16 . An implantable medical device comprising:
 a wire frame;   a cover connected to the wire frame, wherein the cover is fashioned from a fabric, the fabric comprising:
 a PET fabric made of PET yarn, wherein the PET yarn is made from a plurality of PET fibers; and 
 a ferromagnetic material combined with the PET fabric; and 
   a sensor positioned on the cover and connected to the wire frame;   wherein the cover is configured to shield the sensor from detuning effects of the wire frame.   
     
     
         17 . The implantable medical device of  claim 16 , wherein the wire frame is formed of struts and openings, and wherein the cover is connected to the struts of the wire frame by stitching the cover onto the struts, and wherein the sensor is connected to the wire frame by stitching the sensor onto the wire frame, and wherein the stitching extends through the cover. 
     
     
         18 . The implantable medical device of  claim 16 , wherein the cover extends from a top of the wire frame to a bottom of the wire frame. 
     
     
         19 . An implantable medical device comprising:
 a wire frame formed of struts and openings;   a cover connected to the struts of the wire frame, wherein the cover is fashioned from a fabric, the fabric comprising:
 a PET fabric made of PET yarn, wherein the PET yarn is made from a plurality of PET fibers; and 
 a ferromagnetic material combined with the PET fabric; and 
   a sensor positioned on the cover and connected to the wire frame;   wherein the cover is configured to shield the sensor from detuning effects of the wire frame.   
     
     
         20 . The implantable medical device of  claim 19 , wherein the ferromagnetic material is a coating of ferromagnetic material on the plurality of PET fibers; and wherein:
 the plurality of PET fibers with the ferromagnetic material coating are woven together to form the fabric;   the plurality of PET fibers with the ferromagnetic material coating are knit together to form the fabric; or   the ferromagnetic material is a plurality of ferromagnetic fibers coating the PET fibers by being braided around the PET fibers.